Deleted 05.mirror/01.new-course-main/textbook.en.md, 05.mirror/01.new-course-main/textbook.es.md, 05.mirror/01.new-course-main/textbook.fr.md, 05.mirror/02.new-course-overview/cheatsheet.en.md, 05.mirror/02.new-course-overview/cheatsheet.es.md, 05.mirror/02.new-course-overview/cheatsheet.fr.md, 05.mirror/03.new-course-beyond/annex.en.md, 05.mirror/03.new-course-beyond/annex.es.md, 05.mirror/03.new-course-beyond/annex.fr.md, 05.mirror/04.new-course-parallel-1/default.en.md, 05.mirror/04.new-course-parallel-1/default.es.md, 05.mirror/04.new-course-parallel-1/default.fr.md, 05.mirror/05.new-course-parallel-2/form.en.md, 05.mirror/05.new-course-parallel-2/form.es.md, 05.mirror/05.new-course-parallel-2/form.fr.md, 05.mirror/06.course-level-down/page.en.md, 05.mirror/06.course-level-down/page.es.md, 05.mirror/06.course-level-down/page.fr.md, 05.mirror/07.course-level-up/portal.en.md, 05.mirror/07.course-level-up/portal.es.md, 05.mirror/07.course-level-up/portal.fr.md, 05.mirror/topic.en.md, 05.mirror/topic.es.md, 05.mirror/topic.fr.md files